Expedition 31 NASA backup crew member Kevin Ford, bottom, Evgeny Tarelkin and Oleg Novitskiy, top, pose for photos before they start their International Space Station Russian segment event simulation for their final qualification test in preparation for flight, Tuesday, April 24, 2012 at the Gagarin Cosmonaut Training Center in Star City, Russia. Photo Credit: (NASA/Carla Cioffi)